Telex BP-2002, BP-1002 General Description, Eliminating MIC-KILL and Call Signal

APPENDIX A

OPTIONAL FOOTBALL MODIFICATIONS

GENERAL DESCRIPTION

In Audiocom® Intercom Systems, the Mic-Kill feature is used to turn off any activated microphones on a selected channel. The Mic-Kill feature is activated when the beltpack receives a 24 kHz signal from the channel. In some applications the Mic-Kill and Call signal features are not desired and need to be disabled.

ELIMINATING MIC-KILL AND CALL SIGNAL

CAUTION

TO PREVENT DAMAGE TO THE EQUIPMENT, THESE MODIFICATIONS SHOULD ONLY BE MADE BY QUALIFIED TECHNICIANS.

If desired, the Mic-Kill and Call signal features can be disabled in the BP- 2002/BP-1002 by removing a surface-mounted capacitor from the printed circuit board. Perform the following:

1.Before making changes to the printed circuit board, disconnect all power and line connections from the beltpack.

2.Refer to Figure 3 and locate C61 on the underside of the printed circuit board.

3.Remove capacitor C61 from the printed circuit board.

RESTORING MIC-KILL AND CALL SIGNAL

To restore the Mic-Kill and Call signal features, replace C61 with Telex® part

number 102879-218, 1500 pF, 50V capacitor.

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